Yuasa YUMICRON YUA00ACC04 Manuel d'utilisateur télécharger pdf (Page 31)

(10 hour rate discharge

characteristics)

Terminal Voltage (v)

0.6C

0.4C

0.2C

0.1C

Think about what types of vehicles a sealed VRLA battery

goes into: most aren’t like the family car, driven day-in,

day-out. They’re probably used once in a while, or

maybe even stored for weeks or months at a time.

That demands a special kind of battery – one with

extra power to reliably start that engine, every time. In

YUASA’s sealed VRLA batteries, the plate groups are spe-

cially designed to deliver that. The graph to the right

shows the increase in discharge time of a sealed VRLA

battery compared to a conventional Yumicron battery

at both cold and room temperatures. The graph below

shows the cold temperature performance of the sealed

VRLA battery as the load increases. “C” equals the

Amp Hour Capacity Rating of the battery.

Discharge Characteristics

Starting the engine is a big part of the battery’s job, but

not all. Electrical accessories and safety systems – lights

and horn – need a stable supply of electricity. Now

you’re concerned with the battery’s “low rate discharge

characteristics.” This steady, low rate discharge is

measured in “10-hour rate discharge.” The graph

above shows the discharge characteristics of YUASA’s

YT or YI sealed VRLA batteries at different current rates.

Note that battery capacity is a function of the current

being used (or discharge current) x time.

01234567891011

Discharge Duration (hour)

Discharge Characteristics of a

Sealed VRLA Battery by Capacity

(C = 10 hour rate capacity)

SECTION

Sealed VRLA

Batteries

Terminal Voltage (v)

Sealed VRLA

Conventional

01 23 4

Discharge Duration (minute)

High Rate Discharge Characteristics of a

Sealed VRLA 4 AH Battery

20A Discharge Characteristics

77°F (25°C)

14°F (-10°C)

1 2 ... 26 27 28 29 30 31 32 33 34 35 36 ... 43 44

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Yuasa YUMICRON YUA00ACC04 Manuel d'utilisateur Page 31

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